World War 1 By awalker6699 Jun 28, 1914 Assassination of Archduke Ferdinade Assassination of Archduke Ferdinand Jul 30, 1914 Russian Mobilization Russian Mobilization Aug 6, 1914 Austria declared war on Russia Austria declared war on Russia Period: Sep 6, 1914 to Sep 10, 1914 The First Battle Of Marne First Battle of Marne May 7, 1915 Lusitania Sinks Lusitania Sinks Period: Feb 21, 1916 to Dec 18, 1916 The Battle Of Verdun The Battle Of Verdun Sep 15, 1916 Zimmermann Telegram Zimmermann Telegram Apr 6, 1917 United States declare war on Germany United States declare war on Germany Period: Jul 31, 1917 to Nov 10, 1917 The Battle of Passchendaele The Battle of Passchendaele Period: Oct 24, 1917 to Nov 19, 1917 The Battle Of Caporetto (The Battle Of Caporetto)(https://www.thoughtco.com/key-battles-of-world-war-one-1222036) Dec 7, 1917 U.S Declared Was On Austria-Hungary U.S Declared Was On Austria-Hungary Period: Jun 1, 1918 to Jun 26, 1918 The Battle Of Belleau Wood The Battle Of Belleau Wood Nov 11, 1918 Armistic Day Armistic Day Jun 28, 1919 The Treaty Of Versailles The Treaty Of Versailles